Lock.



P. B.J0 HNSON.

I LOCK.

APPLICATION FILED MAR. 7, 1915. 1,200,949. Patented Oct. 10,1916.

2 SHEETS-SHEET lgwuenfoz Wil'naooeo 3 PL B. JOHNSON.

LOCK.

APPLICATION FILED MML 17, 1916.

1,200,949. Patented Oct. 10,1916.

2 SHEETS-SHEET 2.

Gttom 113 m: NORms PETERS cm, PNDTO-LITNQ. WASHINGTON, n..c

"UNITED STATES rA'rnN'r .oFnioE- I PRESLEY B. JOHNSON, OF SACRAMENTO,CALIFORNIA.

LOCK.

Application filed. March 17, 1916.

To all whom it may concern Be it known that I, PRESLEY B. JOHNSON, acitizen of the United States, residing at Sacramento, in the county ofSacramento and State of California, have invented certain new and usefulImprovements in Locks; and I do hereby declare the follow ing to be afull, clear, and exact description of the invention, such as will enableothers skilled in the artto which it appertains to make and use thesame.

This invention relates to new and useful improvements in a lock and oneof its objects is the provision of a device of this character, whichshall be simple, durable and efiicient, and which may be manufacturedand sold at .a comparatively low cost.

Another object of this invention is to provide a casing, having apivoted shackle and a locking disk, which will automatically lock thefree end of the shackle upon insert-' ing it within the casing.

A further object of this invention is to provide a novel means oflocking the looking disk against rotation after the free end of theshackle has been inserted within the casing.

A further object of this invention is to provide means for releasing thelocking means which holds the locking disk against rotation, whereby thefree end of the shackle I may be withdrawn from the casing and the .iagmeat ryrhe V w. l tr ingl P- locking disk will return to its normalposition.

A still further object of this invention is to provide means foroperating a series of recording dials upon unlocking of the shackle, toindicate the number of times the lock has been opened or unlocked.

With these and other objects in view as -will become more apparent asthe description proceeds, the invention consists in certain novelfeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described and cl aimed.

For a complete understanding of my in vention, reference is to behadto'thefollowing description and accompanying drawings, in whichFigure 1 is a front elevationofa lock, constructed in accordance with myinven tion. Fig. 2 is a vertical'sectional view of the same,illustrating the free end of the shackle locked within the casi g Fig,3- is a Specification of Letters Patent.

Patented Oct. 10, 1916.

Serial No. 84,830.

crating disk and a guard disk. Fig. 4 is a bottom planview of thelocking disk removed from the casing, illustrating the means ofreturning it to its normal position, Flg. 5 is a fragmentary verticalsectional view, taken on the line 5 is a vertical sectional view of oneof the keys for unlocking the lock, Fig. 7 is a fragmentary plan view ofthe operating disk removed from the casing, and illustrating the guardfor preventing an incorrect key from rotatlng it, and Fig. 8 is avertical sectional vview of another key.

Referring in detail to the drawings, the numeral 1 indicates a casing,consisting of a bottom wall 2, end walls 3, top walls 4, a rear wall 5and a front wall 6. Formed on one end of the top wall 4 is a pair ofears. 7, to which a shackle 8 is pivoted, having its free end reduced asindicated at 9 and 5 of Fig. 3, Fig. 6

adapted to extend into the casing 1 through an opening 10in the top wall4. A lug 11 is ing withdrawn from the casing 1 A locking disk 13 isjournaled on the stud shaft 1 1 and is provided with arms 15, 16 and 17thereon. When the reduced end 9 of the shackle 8 is inserted into thecasing 1,

it engages the arm 15 and causes the locklng disk to rotate and the arm15 to engage a stop 18 carried by one of the end walls 3. When the arm15 moves in the direction of the stop 18, the arm 16 passes into theslot 12 of the reduced end 9 of the shackle. A. tumbler 19 is pivoted tothe rear wall 5 and rests uponthe end of the arm 17 when the lockingdisk 13 is in an unlocked position,

and as the locking disk is rotated in theheretofore mentioned manner,the tumbler moves downwardly and engages the side of the arm 17 asillustrated in Fig. 2 and prevents the locking disk 13 from rotating ina reverse direction which is caused by the tension of a spring 20, thatis embedded in a recess 21 upon the rear side :thereof and which engagesa lug 22 carried by the rearwall 5,

secured to one end and which is bent back upon itself and secured to thepivoted end of the tumbler 19 for causing the tumbler 19 to engage theside of the arm 17 Q The arm portion 25 of the L-shaped bracket 23provides a guard to prevent a person from tampering with the tumbler 19when the shackle is in an unlocked positiom'and also provides a stop forpreventing the locking disk 13 'from rotating ifflthestop 18 is bent orbroken insome manner, while the shackle 8 is in an unlocked position,thus preventing the lock frombecoming useless. The tumbler 19 isprovided with an enlarged portion 26 to provide an upwardly inclinedworking face 27 for a purpose which .will'be hereinafter morefullydescribed; I

. An operating disk 28 isjournaled on a stud shaft 29 carried by therear wall 5 and is provided with a recess 30, similar to the recess 21in the locking disk 13 to receive a spring 31, which engages a lug 32carriedbythe rear wall 5. The operating disk 28' is provided. with a keyslot 33 and a plurality of arcuate shapted slots 34, which intersect thekeyslot 33. A plurality of guard pins are secured to the rear wall 5 andextend into the arcuate shaped slots 34 of the operating disk 28, toprevent said disk from being rotated by an incorrect key.

,, Secured to theoperating disk28, is anarm 36,1 having a rounded head37 which engages the working face 27, to raise the tumbler 19 upwardlywhen the operating disk is turned by the key; 38, which consists of abit 39, having lugs40 providing notches 41. The

- bit 39 ofthekey 38 is placed through the key-hole 43 of thefront wall6 and within the key slot 33 upon the end of the stud shaft 291and thelugs 40 engage the portions that are indicated by thexnumeral 42 and byturning the. key to the right, the operating disk 28 is turned in'asimilar direction causing the arm 36 toraise the tumbler 19- andtfreethe locking disk 13.

The notches .41 in the bit 39 of the key 38 will allow thegkey to passthe guard P11181351. .After the locking disk has been freed, the shackle=8may be readily with drawn from the casing 1.

A stud shaft 44 is secured to the rear wall 5'and has journaled thereona guard disk 45, Wl1lCl1 overlies a portion of the operatingdisk. 28.'--The guard disk 45 is provided witha key slot46 and a projection 47.. Apluralityof guard pins 48 are secured to the front wallr6 and extend in"hole 43, to prevent theguard disk 45 from being operatedwby anincorrectkey. Be fore theoperating di'sk12'8 can beturned to release the lockingdisk 13, by the key 38, it is necessary to turn the guard disk 45, sothat the key slot 46 will be in registration with the key slot 33. Inorder to turn the guarddisk 45 to accomplish the above result, a key 49,having a recess 50 to receive the end of the stud shaft 44 and a bit 51having a plurality of teeth 52 forming recesses 53., which allow the bit51 to pass the guard pins 48 and the teeth 51, to engage the projection47. By turning tlie'key 49 to the left, theguard disk 45 will be turnedin the same direction to bring the key slot 46 into registration withthe key slot 33. The key 49 is then turned to the right allowing theguard disk to remain stationary and is then Withdrawn from the casing 1.The key 38 is then inserted within the casing 1 and through the key .1

slot 46 of the guard disk 45 to engage the key slot 33 to turn theoperating disk to the right for raising the tumbler 19 from an"engagement with the arm 17 to free the locking disk 13, whereby theshackle 8 may .i

be withdrawn from the casing 1.

A recording device is positioned within the casing 1 and consists ofdials 54, 55, 56 and 57, which are journaled within the easing land are.each provided with a scale running from zero to nine. The casing 1 isprovided with sight openings 58, whereby the scale of the dials 54, 55,56 and 57 next numeral of the scale in registration with thecorresponding sight opening 58' in the front wall 6' of the casing 1.

Pivoted to the arm 36 is a lever 62, which is supported by a yoke 63carried bythe top wall 4. The free end of the lever 62 engages the teeth59 of the dial54 and rotates said dial 54-when the operating disk 28 isturned to the right by the key 38 to unlock the locking disk 13. Thus itwill be noted that the dial 54 is turned twice upon unlocking the lockonce, whereby a person may determine if an unauthorized person has beentampering with the guard disk 45 or turning same and also it can bedetermined if the lock has been opened by an unauthorized person bykeeping note of the numerals showing through the sight openings 58, whenthe look was last unlocked. j I

Secured to the front Wall '6 of thecasing 1 is a key-hole guard plate 64Which is normally held over the key-hole 43 by a spring and a guardplate 66 is adapted to close .the openings 58 by the tension of a spring67, to prevent dirt and other foreign matter from entering the casing 1.

While I have shown and described the preferred embodiment of myinvention, it will be understood that minor changes in construction,combination and arrangement of parts may be made without departing fromthe spirit and scope of the invention as claimed.

Having thus described my invention, what I claim is:

1. A lock comprising a casing, a shackle pivoted to said casing at oneend thereof, the free end of said shackle reduced and inserted withinthe casing, the reduced free end of the shackle provided with anelongated slot therein, a locking disk journaled in said casing, threearms secured to said -disk, a stop secured to said casing adjacent thelocking disk for engagement with the first arm when the second armengages the elongated slot of the reduced free end of the shackle, meansfor engaging the third arm to prevent reverse rotation of the lockingdisk, and means for releasing the locking means to allow the lockingdisk to rotate in a reverse direction to allow the reduced free end ofthe shackle to be withdrawn from the casing.

2. A look comprising a casing, a shackle pivoted to said casing at oneend thereof, a reduced extension formed on the free end of said shackleand adapted to extend into the casing, said extension provided with anelongated slot therein, a locking disk journaled in said casing, meanscarried by the locking disk for an engagement with the extension forrotating the locking disk when the extension is moved into the casing,means carried by the locking disk for extending through the elongatedslot, an arm carried by the locking disk, a substantially L-shapedbracket secured to the casing to provide a guard for said arm, a tumblerpivoted to said casing and adapted to engage the arm to hold the lockingdisk against reverse rotation, and means for raising the tumbler from anengagement with the arm to allow the locking disk to rotate in a reverserotation to free the extension of the shackle.

3. A lock comprising a casing, a shackle pivoted to said casing at oneend thereof, an extension formed on said shackle and adapted to extendinto the casing, said extension provided with an elongated slot therein,a spring pressed locking disk journaled in said casing, means carried bythe locking disk for engaging the end of the reduced extension forrotating the locking disk when the extension is inserted within thecasing, means carried by the locking disk for engaging the elongatedslot in the extension, an arm formed on the locking disk, an- L-shapedbracket secured to said casing, a tumbler journaled in said casing, aleaf spring secured to one end of the L-shaped bracket and bentintermediate 1ts ends and secured to the tumbler for holding the tumblerinto an engagement with said arm, and means for raising the tumbleragainst the tension of said spring for allowing the locking disk torotate in a reverse direction.

4:. A look comprising a casing, a shackle pivoted to said casing at oneend thereof, an extension formed on said shackle and adapted to extendinto said casing, a spring pressed'locking disk journaled in saidcasing, means carried by the locking disk for detachably securing theextension 'to the locking disk, a spring pressed tumbler pivot allysecured to the casing for preventing reverse rotation of the springpressed locking disk, an operating disk journaled in said casing, an armcarried by said operating disk for an engagement with the tumbler, andmeans for rotating the operating disk to raise the tumbler to allow thelocking disk to rotate in the reverse direction.

5. A look comprising a casing, a shackle pivoted to said casing at oneend thereof, an extension formed on said shackle and adapted to extendinto the casing, a spring pressed locking disk journaled in said casing,means carried by the locking disk for detachably securing the extensionto the locking disk, an arm secured to the locking disk, a springpressed tumbler pivoted to said casing and adapted to engage the arm toprevent reverse rotation of the locking disk, a spring pressed operatingdisk journaled in said casing, an arm formed on said operating disk foran engagement with the tumbler, said operating disk provided with a keyslot and a plurality of arcuate slots, a plurality of guard pins carriedby the casing and extending into the arcuate slots, and a key forrotating the operating disk to raise the tumbler and allow the lockingdisk to rotate in areverse direction.

6. A look comprising a casing, a shackle pivoted to said casing at oneend thereof, an extension formed on said shackle and adapted to extendinto the casing, a spring pressed locking disk journaled in said casing,means carried by the locking disk for detachably securing the extensionto the locking disk, an arm secured to said locking disk, a springpressed tumbler pivoted to said casing and adapted to engage the arm tohold said spring pressed locking disk against reverse rotation, a springpressed operating disk journaled in said casing, an arm secured to saidoperating disk and en gaging the tumbler, said operating'disk pr0- videdwith a key slot, a guard disk journaled ili lsaid c asing and overlyinga portion of to record the number of times the operating the operatingdisk,*sa1d guard disk prodisk and the guard disk are rotated. 10

into registration With the key slot of the in presence of two Witnesses.

yided vith'a key slot adapted to be brought In testimony whereof I afiixmy signature operating disk, means for rotating the PRESLEY- B. JOHNSON.guarddisk and the operatingdisk, and a Witnesses: recording meansoperatiyely Connected to JO N BENZ, thefoperating disk 'and to the guarddisk E. J. RADER.

Qopiesot-tmapatent may benobtainedifor five cents each by addressing the"Commissioner 01 Patents,

v a I i i Washington, D. c. I

